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Operation Valkyrie was an arrangement for Reserve Forces taking control of Berlin as soon as Fuhrer Hitler is assassinated. Col. Stauffenberg plants the bomb as planned and it blasts. Albeit Hitler survives, the message of his assignation is communicated though the telephone lines aren't clear, leading to a three hours delay in invoking the Valkyrie. A combination of bad luck, uncoordinated sequence of moves, delay and human errors fail to take control of Berlin.
Amazing, how a well directed movie can make you bite your nails - even after 65 years – and anticipate an alternative ending, even when you know the outcome. A must watch film. *****